<template>
  <div class='wrapper infinite-list'
       v-infinite-scroll="loadMore"
       infinite-scroll-disabled="busy"
       infinite-scroll-distance="50">
    <play-list :playList="list"></play-list>
    <template v-if="isLoading">
      <Loading />
    </template>
  </div>
</template>

<script>
import playList from '@components/common/play-list'
import Loading from '@components/common/loading'
export default {
  name: 'PalyList',
  components: {
    playList,
    Loading
  },
  created () {
    this.getPlayList(this.params)
  },
  props: {
    params: {
      type: Object,
      default: () => { }
    },
    // 是否有滚动条
    isScroll: {
      type: Boolean,
      default: false
    }
  },
  data () {
    // 这里存放数据
    return {
      list: [],
      isLoading: true,
      busy: true
    }
  },
  // 监听属性 类似于data概念
  computed: {},
  // 方法集合
  methods: {
    async getPlayList (params) {
      const { data: res } = await this.$http.playList(params)

      if (res.code !== 200) {
        return this.$msg.error('数据请求失败')
      }

      this.list = this.params.offset !== 0 ? [...this.list, ...res.playlists] : res.playlists
      this.busy = this.list.length >= res.total
      this.isLoading = !this.busy
    },
    loadMore () {
      if (this.isScroll) {
        this.busy = true
        this.params.offset = this.list.length
      }
    }
  },
  watch: {
    params: {
      handler (newVal, oldVal) {
        if (newVal.cat !== oldVal.cat) {
          this.list = []
        }
        this.getPlayList(newVal)
      },
      deep: true // 深度监听
    }
  }
}
</script>
<style scoped lang="less">
.wrapper {
  min-height: 500px;
}
.item {
  width: 18%;
  padding: 20px 2% 30px 0;
  margin-right: -22px;

  .faceImg {
    display: block;
    position: relative;
    height: 216px;

    &::after,
    &::before {
      content: '';
      width: 100%;
      height: 100%;
      background-color: #d9d9d9;
      position: absolute;
      top: 0;
    }

    &::before {
      border: 1px solid #d6d6d6;
      right: -4px;
      -webkit-transform: scale(0.85);
      -ms-transform: scale(0.85);
      transform: scale(0.85);
      -webkit-transform-origin: 100% 50%;
      -ms-transform-origin: 100% 50%;
      transform-origin: 100% 50%;
      z-index: 2;
      border-radius: 2px;
      transition: all 0.4s linear;
    }

    &::after {
      border: 1px solid #c4c4c4;
      right: -8px;
      -webkit-transform: scale(0.73);
      -ms-transform: scale(0.73);
      transform: scale(0.73);
      -webkit-transform-origin: 100% 50%;
      -ms-transform-origin: 100% 50%;
      transform-origin: 100% 50%;
      z-index: 1;
      border-radius: 2px;
      opacity: 0.5;
      transition: all 0.4s linear 0.1s;
    }
  }

  .el-image {
    width: 100%;
    height: 100%;
    z-index: 3;
    border-radius: 4px;
  }

  .playCount {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 4;
    font-size: 12px;
    display: block;
    width: 45%;
    text-align: center;
    color: #fff;
    line-height: 30px;
    border-radius: 0 4px 0 0;
    /* Permalink - use to edit and share this gradient: https://colorzilla.com/gradient-editor/#000000+0,000000+100&0+0,0.5+97 */
    background: -moz-linear-gradient(
      left,
      rgba(0, 0, 0, 0) 0%,
      rgba(0, 0, 0, 0.5) 97%,
      rgba(0, 0, 0, 0.5) 100%
    ); /* FF3.6-15 */
    background: -webkit-linear-gradient(
      left,
      rgba(0, 0, 0, 0) 0%,
      rgba(0, 0, 0, 0.5) 97%,
      rgba(0, 0, 0, 0.5) 100%
    ); /* Chrome10-25,Safari5.1-6 */
    background: linear-gradient(
      to right,
      rgba(0, 0, 0, 0) 0%,
      rgba(0, 0, 0, 0.5) 97%,
      rgba(0, 0, 0, 0.5) 100%
    ); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#00000000', endColorstr='#80000000',GradientType=1 ); /* IE6-9 */

    .icon-playnum {
      color: #fff;
    }

    em {
      display: inline-block;
      padding-left: 5px;
      font-style: normal;
    }
  }

  &:hover {
    .faceImg {
      position: relative;

      &::after,
      &::before {
        background: #ff960080;
      }

      &::before {
        right: -6px;
      }

      &::after {
        right: -12px;
      }
    }

    .info_name {
      color: #000;
    }
  }
}

.info_name {
  display: block;
  font-size: 16px;
  line-height: 22px;
  margin-top: 15px;
  font-weight: 400;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  word-break: break-all;
}

.tags {
  padding: 5px 0;
  .tag {
    font-size: 12px;
    color: @color-theme;
  }
}
</style>
